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Baseball cards have always been a fairly social collectible. Kids – and adults – trade them actively as they try to complete their collections.

Well, now the Topps Company has taken that social part of the experience to the iPhone, letting people connect with other fans and collect their favorite players. It’s fantasy baseball, but on a simplified level.

But what makes it really noteworthy is the app is completely free – without a hidden in-app purchase option in site. If you want to do better, you’ll have to work with others.